I have an iSonic 117 Wide and I can confirm that a 7.8 m2 sail is fine, even for my 65 kg light weight up to 18 kts of wind. So I'm sure that it would be no problems with 20 kg more body weight to keep her flying above chop at full speed.

I also doubt you can start and sustain the planing as of 10 knots with iSonic 110 + 7.8 sail combo for your 87 kg. I can do that on iSonic 117 Wide but I need an 8.6 sail. I need more wind for sure with a 7.7 sail.
So, if you really want to enjoy blasting in 10 knots winds, better look at iSonic 127 + 9.6 sail combo IMHO. Several of my 80-90 kg buddies are using that kind of kit and we are on par when doing drag racing as of 10 knots of steady wind despites our ±20 kg body weight difference. A 7.8 sail is definitely way too small in such light winds.

Mcross19- this one is actually 80% carbon SDM i think the shorter ones are 60%.

I also consider buying 111 but I wondered how much different it is from 107 or 117 because I have no knowledge about these boards.

All best!

The 107 is the successor of the 111. Same width, probably almost the same volume. Starting from 2011, all boards carry more precise volume specs.

I agree with most replies above, i.e. if you're aiming for the lower end, then forget about the IS107 (or 111) but go for the 117W (80cm) but also go for a bigger sail next to the 7.8, at least 8.6 or 9.5.

Hi mate, this is my 2 cents worth.
1. 121/122 and 7.8 ( better lower end).
2. Or the 107/ 7.8. ( better higher end).
3. Spend more dollars and get the 110 and an 8.6 with your extender ( I would also get a 7.8 and you you would have lower and higher wind covered).
Good luck with what you decide.

Cheers Ozi.

I agree with the above comments, but I'd skip the IS122 and get the Is107 or the IS110. I have experience with both the 122 and 107 and IMO the 107 is a much better board. I have the IS110 on order so I'll have an idea how it compares with the 107 shortly. If you can find a used 107 and a 127 or a 97 and a 117 wide for roughly the same price as a new Isonic then I would go that route. Buy good used sails from sizes 6.2 to 9.5 (6.2, 7.0, 7.8 or an 8.2 and a 9.2 or 9.5) and you'll be covered for most "normal" conditions. If you're willing to look you can find great used equipment or a fraction of the price of new.

I'm 180 to 185 pounds (82 kilos). I sail relatively flat water and the 110 should fulfill my needs better than my 107 (which I really like). It took awhile to receive the board, but was worth the wait. The 110 is fast on a reach and is extremely good upwind and off the wind. IMO there's no comparison between it and the 122 -- I like the 110 much better. I have the carbon version of the 110 and it is extremely light and feels very responsive on the water -- definitely a keeper.

It is my impression that the 110 has a more "formula" feel to it than the 107. This could be good or bad depending what you're looking for in a board. I've owned and sailed formula boards and it seems to me that Starboard has successfully combined many of the positive attributes of a formula board in a relatively small slalom package. The downside is that the 110 appears to be a little tougher to control in overpowering gusts. I would chose the 107 in big winds if my only other choice was the 110 and the 110 over the 107 for all other conditions.

The footstrap setup on the 110 is quite radical -- the rear footstrap is located right on the edge of the rear winger. For anyone used to the Isonics this won't be a problem. Also the deck concave on the 110 is more spread out and this makes it easier to insert the mast foot and twist it to tighten it down. The deep Tuttle box for the fins is a nice touch and it will easily take both deep and normal Tuttle fins. It comes with four screws for the fins (two longer ones for the normal fins and two shorter for the deep fins). Where you insert the screw is still recessed like the 107 so the tail must be pretty thick to take a deep Tuttle fin and still have the screws lowered into the board before you tighten them.

I'm not sure if the tail cutaways, the double wingers etc. actually effect the board's overall sailing characteristics in a positive way, but they sure look radical and the 110's performance is very impressive.